Responding to a leaked document from the Department for Exiting the EU on potential goods checks between Northern Ireland and Britain after Brexit, Liberal Democrat Shadow Brexit Secretary Tom Brake said:
"These documents show Boris Johnson is hiding the truth about the damage his Brexit plans would do to our family of nations.
"He has lied to the Queen, lied to Parliament and now he's lying to the public.
"If Boris Johnson gets a majority, the Brexit chaos will drag on for years to come as it's clear major issues like the Irish Border will remain unsolved.
"Every vote for the Liberal Democrats is a vote to stop Boris, stop Brexit and invest the £50 billion pound Remain Bonus in our public services."